Last updated 2026-07-09
TL;DR
Functional Communication Training (FCT) replaces problem behaviors with intentional communication, using prompting and reinforcement. It's been studied since 1985 and is recommended by ASHA and the AAP. The best autism center programs pair a credentialed BCBA with a speech-language pathologist, individualize the replacement behavior, and involve parents in daily carry-over. No single center is universally best. Quality depends on specific practices you can check before enrolling.
What is functional communication training and how does it work?
Functional Communication Training, almost always shortened to FCT, is a behavioral intervention developed by Edward Carr and Mark Durand in 1985 [1]. The core idea is simple. If a child is hitting, screaming, or melting down to get something (attention, a break, a preferred item, sensory relief), you teach them a communicative behavior that gets them the same thing more efficiently. The problem behavior stops being useful, so it fades.
The replacement behavior can be anything the child can actually do: a spoken word, a sign, a picture card, a button press on a speech-generating device, a full AAC system. That last point matters more than people realize. FCT is not locked to one communication modality. A child who is entirely nonverbal can do FCT with a switch that says "break please," and a verbal child can do it with a spoken phrase. The method fits the learner, not the other way around.
The mechanics involve three steps. First, a functional behavior assessment (FBA) figures out why the behavior is happening, because you can't pick a good replacement message without knowing the function. Second, a specific communicative response is selected and systematically prompted. Third, that response is reinforced consistently and the problem behavior is put on extinction (meaning it no longer produces the outcome it used to). Carr and Durand's original study reported that FCT reduced problem behavior by 80 to 90 percent in some participants [1].
FCT sits within Applied Behavior Analysis (ABA), but many speech-language pathologists use it too, particularly in collaboration with behavior analysts. The American Speech-Language-Hearing Association lists it as an evidence-based practice for individuals with autism [2].
Is FCT actually evidence-based? What does the research say?
Yes, and the evidence base is unusually strong for a behavioral intervention. A 2008 review by Tiger, Hanley, and Bruzek looked at 89 FCT studies and concluded that FCT "has been shown to be a durable and generalizable treatment" across ages, settings, and communication modalities [3]. That review covered studies from preschoolers to adults, classroom settings to clinic settings, and found consistent reductions in problem behavior alongside increases in communication.
The National Autism Center's National Standards Project classified FCT as an "established" treatment, meaning the research quality and quantity meet the highest bar the organization uses [4]. The AAP's 2020 clinical report on autism interventions lists behavioral interventions with naturalistic developmental components, including FCT, among those with the strongest evidence for communication outcomes [5].
Nobody has perfect data on exactly how large an effect FCT produces in real center-based programs versus controlled research conditions. The honest answer: controlled studies show very large effects, and real-world studies tend to show meaningful but more modest reductions (closer to 40 to 60 percent reductions in target behaviors, depending on implementation quality). That gap is normal in behavioral research. It's mostly explained by treatment fidelity and how consistently parents and staff carry the intervention across settings.
What makes a high-quality FCT program at an autism center?
This is where the evaluation work lives. A center can call anything "FCT" on a brochure. These are the specific practices that separate strong programs from weak ones.
A real functional behavior assessment comes first. FCT without an FBA is guesswork. A genuine FBA involves direct observation, indirect assessment (interviews with parents and teachers), and often structured experimental conditions called a functional analysis. Ask the center how they conduct their FBAs and how long they take. A 15-minute checklist is not an FBA.
The replacement communication form matches the child's current abilities. If a child has no reliable spoken language, the center should not be holding out for speech as the replacement. This is the biggest failure mode I see. A picture exchange, a sign, or an AAC device should be on the table from day one.
A speech-language pathologist (SLP) is involved, more than a BCBA. BCBAs are trained in behavior analysis and can run FCT well. But an SLP brings specific expertise in communication form, motor planning, language development, and augmentative and alternative communication that changes how the replacement behavior is chosen and taught. The best programs have both.
Parents are trained to run the protocol at home. Generalization is the hardest part of any behavioral intervention. If FCT only happens in the therapy room, the child learns the replacement communication in the therapy room. Centers that train parents to run the same protocol at home, with coaching and feedback, produce much better outcomes. A study by Wacker et al. (2013) found FCT delivered primarily by parents via telehealth produced outcomes comparable to clinic-based delivery [6].
Data are collected and shared. Frequency of the problem behavior and frequency of the replacement communication should be tracked at every session. If a center cannot show you a graph of these over time, they are not doing FCT with appropriate rigor.
The replacement behavior is reviewed regularly. Kids grow. A picture card might be the right starting point, and a speech-generating device might be the right endpoint. Good programs have a built-in process for expanding the child's communication system as they progress. See speech therapy and autism for a broader view of how FCT fits into total communication planning.
How do autism centers compare on FCT program structure?
There is no universal accreditation that signals a great FCT program specifically. There are, however, structural markers you can check before you ever visit a center.
| Feature | Strong FCT program | Weak FCT program |
|---|---|---|
| FBA process | Multi-method, 2+ weeks of data | Brief checklist or skipped |
| Staff credentials | BCBA + SLP collaboration | One discipline only |
| Communication modality | Chosen based on child's current profile | Speech-only or device-only |
| Parent training | Structured, with competency check | Verbal advice in hallway |
| Data system | Session-by-session graphs | Monthly summary at best |
| Generalization plan | Written, across settings and partners | Not addressed |
| Review cycle | Every 4 to 6 weeks | When parents ask |
Centers affiliated with university programs often have stronger research alignment. University-affiliated programs regularly publish their outcomes and take part in ongoing research, which tends to keep their protocols current. Community ABA centers vary enormously. Some are exceptional. Some run outdated protocols because staff turnover is high and training investment is low.
The Behavior Analyst Certification Board (BACB) maintains a public certificant registry where you can verify BCBA credentials [7]. ASHA has a similar ProFind tool for SLPs [2]. Use both.
What questions should I ask a center before enrolling?
Bring this list to any intake meeting. The answers will tell you almost everything you need to know.
1. What does your functional behavior assessment process look like, and who conducts it? 2. How do you decide what the replacement communication form will be? 3. Is there a speech-language pathologist on staff, and how involved are they in FCT planning? 4. What happens if my child is nonverbal or has limited motor speech? Do you use AAC as a replacement behavior? 5. How do you train parents to run the protocol at home? 6. Can I see a sample data graph from a previous FCT case (de-identified)? 7. How often is the FCT plan formally reviewed and updated? 8. What is your approach when the replacement behavior is not reducing the problem behavior? 9. How do you handle extinction bursts (the temporary increase in problem behavior when FCT starts)? 10. What staff-to-child ratio do you use during FCT sessions?
Question 9 is one most parents don't think to ask, and it reveals a lot. Extinction bursts are predictable and can be intense. A center that has a clear, calm protocol for handling them is a center that's actually doing FCT correctly.
How much does FCT through an autism center cost?
This is genuinely complicated, and I'll be honest about the uncertainty. ABA therapy, the most common delivery vehicle for FCT, runs roughly $120 to $200 per hour for direct therapy in the United States, though regional variation is large [8]. A center-based ABA program typically involves 10 to 40 hours per week, depending on the child's age and needs. That math gets alarming fast.
The good news: as of 2024, all 50 states have insurance mandates requiring coverage of ABA therapy for autism, though what is covered and for how many hours varies by state and insurer. Medicaid covers ABA in most states for eligible children. Getting insurance to pre-authorize enough hours for a meaningful FCT program sometimes requires a letter of medical necessity from the treating team and occasionally a formal appeal.
University-based clinics often use sliding-scale fees and may offer FCT as part of research studies at reduced or no cost. Worth exploring if you're near a university with an autism research program.
Speech therapy sessions, which may include FCT work from the SLP side, average $100 to $250 per session out of pocket, but most health insurance plans cover some SLP services. Early intervention services for children under three are federally mandated to be provided at no cost to families under Part C of IDEA [9].
How is FCT different from PECS, AAC, and other communication approaches?
Parents often see these terms in the same conversations and wonder which one they're actually being offered. Here's the short version: FCT is the framework, and PECS, AAC, signs, and speech are the tools it uses.
FCT is a behavioral intervention framework. It describes why and how you teach communication (to replace problem behavior, using reinforcement and prompting). It does not specify what communication system you use.
PECS (Picture Exchange Communication System) is a specific AAC approach with a structured teaching protocol. PECS can be used as the replacement behavior in FCT. The two are not competing. They're often combined.
AAC devices (speech-generating devices, apps, dedicated communication systems) are tools. FCT can use them. A good FCT program for a nonverbal child almost certainly should use some form of AAC as the replacement response, because pointing to a picture or pressing a device button is often the most learnable and efficient alternative when speech is not yet reliable.
Verbally-based approaches like PROMPT (Prompts for Restructuring Oral Muscular Phonetic Targets) target motor speech production and are relevant for kids with apraxia of speech. They are not FCT, but they might run alongside FCT if a child's problem behaviors are partly driven by frustration about communication breakdowns.
The practical answer: FCT is the "why and how," and PECS, AAC, signs, and speech are the "what." A good center makes this explicit in the child's plan.
What age is FCT appropriate for, and can it help nonverbal children?
FCT has been studied and used with children as young as 18 months (in early intervention contexts) through adulthood [3]. There is no upper age limit. The intervention works for a 3-year-old with limited communication and a 25-year-old with intellectual disability and problem behavior.
For nonverbal children, FCT is particularly well-supported. The research explicitly does not require spoken language as the outcome. A child who learns to hand over a picture card or press a button to request a break has learned functional communication, and that is the goal. Some children who begin FCT with nonverbal replacement responses (pictures, signs, devices) do develop speech over time as their communication confidence and opportunities expand, though that is not guaranteed and should not be the implicit pressure on a nonverbal child.
If your child's speech therapy team has identified echolalia as a communication pattern, know that some forms of echolalia can be a starting point for building functional communication, since the child is already attempting to communicate. An SLP familiar with FCT can help map echolalic patterns onto more conventional replacement behaviors.
Early intervention before age 3 tends to produce the largest effects, consistent with the broader developmental research on brain plasticity, but meaningful gains from FCT are documented at every age in the literature.
How do I find reputable FCT programs near me?
Start with credentials, not marketing materials. These are the actual paths that lead to real programs.
ASHA's ProFind tool (asha.org) lets you search for SLPs by specialty area, including autism. You can filter by state and look for practitioners who list ASD and AAC as specialties [2].
The BACB's certificant registry lets you verify that a BCBA is in good standing. Search by name or location at bacb.com [7].
Your state's autism insurance mandate may include a list of in-network providers. Calling your insurance company and asking specifically for BCBAs who provide ABA with a focus on communication and FCT is a reasonable starting point.
University-based autism clinics are often the best option for families who can reach them. The Association of University Centers on Disabilities (AUCD) maintains a network map of member centers, many of which offer clinic services to the public [10].
Regional autism centers funded through HRSA's Autism CARES Act programs exist in many states and often provide direct services or referral networks. The HRSA website has a current list [11].
When you find a potential center, ask for references from current families and ask specifically whether the program individualized the communication modality for their child. Generic positive reviews mean less than a parent describing how the team pivoted from PECS to a speech-generating device when their child needed it.
How long does FCT take to show results?
In controlled research settings, FCT often produces measurable reductions in target behavior within 2 to 8 weeks of consistent implementation [3]. In real-world settings, the timeline is more variable and honestly harder to predict.
Several things affect how quickly you see results. Implementation consistency matters most. If FCT runs in the clinic but not at home or school, generalization takes much longer. The severity and history of the problem behavior matters too. A behavior that has been reinforced for years has a more established history than one that emerged recently, and it takes longer to teach the brain a new path.
Extinction bursts (the temporary spike in problem behavior when the old behavior stops working) typically peak within the first week or two and then decline. If a center tells you there will be no increase in behavior during FCT, find a different center. That's not how extinction works, and a center that doesn't warn you about this is either uninformed or trying to avoid a hard conversation.
Realistic markers: you should see data showing a downward trend in the target behavior and an upward trend in the replacement communication within 4 to 8 weeks. If you don't see both trends by 10 to 12 weeks, the FBA probably missed the function and the plan needs revision, more than more time.
Can FCT be done at home or through online therapy?
Yes, and the evidence for home and telehealth delivery is actually quite good. The Wacker et al. (2013) study mentioned earlier found that FCT delivered via telehealth with parent implementation produced outcomes comparable to clinic-based delivery [6]. That study used video coaching, where the therapist watched sessions remotely and gave parents real-time feedback through an earpiece.
For families who can't reach a strong center-based program because of geography, wait lists (which are long at nearly every autism center in the country), or cost, parent-implemented FCT with remote coaching is a legitimate option. It takes a motivated parent and a skilled remote clinician, but it's not a compromise in the way that, say, skipping the FBA would be.
Online speech therapy platforms increasingly offer parent coaching models that can build in FCT principles, particularly for families with young children where parent-mediated interventions have the strongest evidence base.
If you're working on communication development between therapy sessions, tools that support consistent daily practice matter. Little Words (littlewords.ai/start) is an AI speech companion built for neurodivergent kids that can support the carry-over practice piece between formal sessions. Families use it between FCT sessions to keep communication opportunities frequent and low-pressure.
One honest caution about fully self-directed FCT: without an FBA, you're guessing at the function of the behavior. A parent who assumes a behavior is attention-seeking when it's actually escape-motivated will accidentally reinforce the problem behavior even while trying to do FCT. Remote supervision from a BCBA or SLP, even monthly, is worth the investment.
What are the most common mistakes autism centers make with FCT?
These are the patterns that show up repeatedly when programs don't produce results.
Skipping or shortcutting the FBA. This is the single most common failure. If the function is wrong, the replacement message is wrong, and the whole intervention is addressing the wrong problem.
Requiring speech as the only replacement behavior. Some centers have an implicit bias toward spoken language as the goal, which means they don't introduce AAC as the replacement even when a child lacks reliable speech. This is clinically wrong, and it often delays progress by months or years.
Not training parents and teachers. A replacement behavior that only works in one setting is a therapy behavior, not a functional communication skill. Generalization requires consistent responses from every communication partner in the child's life.
Inconsistent extinction. Extinction only works if the old behavior never produces the old outcome. A teacher who occasionally gives in during a meltdown is enough to maintain the problem behavior indefinitely. Centers that don't actively train and monitor all staff and family members create the conditions for this failure.
Not reviewing or updating the plan. FCT plans that haven't been updated in six months probably aren't serving the child's current needs. Children develop, functions change, and the replacement behavior that was appropriate at age 4 may not be adequate at age 6.
If you notice any of these patterns at a center your child attends, raise them directly with the program supervisor. Some can be corrected with a frank conversation. Others signal a systemic quality problem that might mean looking for a different program.
Frequently asked questions
What is functional communication training (FCT) in autism therapy?
FCT is a behavioral intervention that teaches a child to use a specific communicative behavior (a word, sign, picture, or device output) to replace a problem behavior that serves the same function, like hitting to get a break or screaming to get attention. It was developed by Carr and Durand in 1985 and is classified as an established treatment by the National Autism Center.
Does insurance cover FCT programs at autism centers?
In most cases, yes. All 50 states now have insurance mandates requiring coverage of ABA therapy for autism, and FCT is typically delivered within ABA programs. Coverage specifics vary by state and insurer. Medicaid covers ABA in most states for eligible children. A letter of medical necessity from the treating team often helps with authorization. Under IDEA Part C, early intervention services for children under three are provided at no cost to families.
How is FCT different from ABA therapy?
FCT is a specific intervention within the broader ABA framework. ABA therapy includes many techniques (discrete trial training, naturalistic teaching, behavior support plans, and more). FCT is one procedure that uses ABA principles (reinforcement, extinction, prompting) specifically to build functional communication as a replacement for problem behavior. A center may do ABA without doing FCT, and FCT should always include a functional behavior assessment.
Can FCT help a nonverbal child with autism?
Yes, and FCT research specifically does not require spoken language. A nonverbal child can use picture cards, signs, or a speech-generating device as the replacement communication behavior. Some nonverbal children develop speech over time as communication opportunities increase, but that is not a requirement or guarantee. The goal is a functional, reliable way to communicate needs, whatever form that takes.
What credentials should FCT providers have?
Look for a Board Certified Behavior Analyst (BCBA) who conducts the functional behavior assessment and designs the behavior support plan, plus a licensed Speech-Language Pathologist (SLP) involved in selecting and shaping the replacement communication behavior. BCBAs can be verified through the BACB certificant registry at bacb.com. SLPs can be verified through ASHA's ProFind tool at asha.org. Both credentials should be current.
How long does it take for FCT to reduce problem behaviors?
In controlled studies, measurable reductions often appear within 2 to 8 weeks of consistent implementation. Real-world timelines vary based on how consistently the protocol runs across home, school, and therapy settings. Expect an extinction burst (temporary increase in problem behavior) in the first week or two. If data don't show a clear downward trend in the problem behavior by 10 to 12 weeks, the functional behavior assessment likely missed the function and the plan needs revision.
What is an extinction burst and should I be worried about it?
An extinction burst is a predictable, temporary spike in the problem behavior that occurs when FCT first begins and the old behavior stops producing its usual outcome. It typically peaks in the first one to two weeks and then declines as the child learns the new replacement works better. A center that warns you about extinction bursts and has a protocol for managing them is doing FCT correctly. One that says the behavior will immediately improve is a concern.
What is a functional behavior assessment (FBA) and why does it matter for FCT?
An FBA identifies the function (reason) behind a problem behavior, such as escaping demands, gaining attention, accessing a preferred item, or seeking sensory input. Without knowing the function, you can't choose the right replacement message. A genuine FBA uses direct observation, parent and teacher interviews, and sometimes structured experimental conditions. A 15-minute checklist is not an adequate FBA. Poor FBAs are the most common reason FCT programs fail to produce results.
Can FCT be done at home without going to a center?
Yes, with appropriate remote supervision. Research by Wacker and colleagues found FCT delivered via telehealth with parent implementation produced outcomes comparable to clinic-based programs. The key requirements are a proper FBA conducted or supervised by a BCBA, structured parent training, and ongoing coaching with feedback. Fully self-directed FCT without professional guidance risks addressing the wrong function, which can accidentally reinforce the problem behavior.
How do I find FCT programs near me?
Use ASHA's ProFind tool (asha.org) to find SLPs who specialize in autism and AAC. Verify BCBAs through the BACB certificant registry (bacb.com). Check whether your state's HRSA-funded autism center has a referral network. University-based autism clinics (searchable through the AUCD network at aucd.org) often provide direct services and tend to use current protocols. Ask any center specifically how they conduct their functional behavior assessments before enrolling.
Is FCT appropriate for older children and adults with autism, or just young kids?
FCT is appropriate across the lifespan. Research documents its use with toddlers in early intervention through adults with intellectual disability and autism. Older individuals may have more established problem behaviors with longer reinforcement histories, which can make FCT take longer, but it remains effective. The replacement communication form simply adapts to the person's current abilities and communication needs at any age.
What AAC options work best as FCT replacement behaviors?
The best AAC option is the one the child can reliably produce in the moment of need. Picture exchange (PECS) works well for children with good visual skills and some intentional reach. Speech-generating devices work for children who can select targets on a screen or switch. Manual signs work for children with good motor imitation. An SLP should assess motor planning, vision, and current imitation skills to guide this choice. The option should be revisited regularly as the child develops.
Sources
- Carr & Durand (1985), Journal of Applied Behavior Analysis: 'Reducing behavior problems through functional communication training': FCT was developed in 1985 by Carr and Durand; original study reported 80-90% reductions in problem behavior in some participants
- American Speech-Language-Hearing Association (ASHA): Autism Spectrum Disorder evidence maps and ProFind tool: ASHA lists FCT as an evidence-based practice for autism and provides a professional finder tool for SLPs
- Tiger, Hanley & Bruzek (2008), Behavior Analysis in Practice: 'Functional communication training: A review and practical guide': Review of 89 FCT studies concluded FCT has been shown to be a durable and generalizable treatment across ages and settings
- National Autism Center: National Standards Project, Phase 2: The National Autism Center classified FCT as an 'established' treatment meeting the highest evidence bar
- American Academy of Pediatrics (AAP): 2020 clinical report on autism spectrum disorder interventions: AAP 2020 clinical report lists behavioral interventions including FCT among those with the strongest evidence for communication outcomes in autism
- Wacker et al. (2013), Journal of Applied Behavior Analysis: 'Conducting functional analyses of problem behavior via telehealth': FCT implemented primarily by parents via telehealth produced outcomes comparable to clinic-based delivery
- Behavior Analyst Certification Board (BACB): Certificant registry: BACB maintains a public registry where BCBA credentials and standing can be verified
- Autism Speaks: ABA therapy cost and insurance coverage overview: ABA therapy costs approximately $120 to $200 per hour for direct therapy in the United States
- U.S. Department of Education: IDEA Part C early intervention program overview: Under IDEA Part C, early intervention services for children under three are federally mandated at no cost to eligible families
- Association of University Centers on Disabilities (AUCD): Network member directory: AUCD maintains a network of university-based disability centers, many of which offer direct clinical services to the public
- Health Resources and Services Administration (HRSA): Autism CARES Act funded programs: HRSA funds regional autism centers through the Autism CARES Act that provide direct services and referral networks in many states